Babbling Curse

"He usually picked Harry to help him with these reconstructions; so far, Harry had been forced to play a simple Transylvanian villager whom Lockhart had cured of a Babbling Curse, a yeti with a head cold, and a vampire who had been unable to eat anything except lettuce since Lockhart had dealt with him."

The Babbling Curse (incantation unknown) is not fully understood but it is presumed to cause a person to babble whenever they try to speak. It is possible that this curse is related to the Tongue-Tying Curse and it is quite plausible that the two may even be the same.

History

According to Gilderoy Lockhart, he once cured a Transylvanian farmer of this affliction, but as he proved an untrustworthy source of information, it is possible the curse does not exist at all. However, the curse itself may exist, but it could be that someone else cured said villager.